Influence of leachates on geotehnical and geochemical properties of termite mound soils

IF 1 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Environmental & Engineering Geoscience Pub Date : 2021-12-01 DOI:10.37023/ee.8.1-2.4
A. Adekunle, F. Nkeshita, Adetayo Akinsanya
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引用次数: 1

Abstract

This study investigated the influence of leachate prepared from Telfairia occidentalis on the geotechnical and geochemical properties of termite mound soil obtained from the premises of the federal university of agriculture, Abeokuta, south-western Nigeria. The termite mound soil samples were collected from three different locations and each sample collected was contaminated by mixing with leachates in percentage increments of 0% 10%, 15% and 20% of dry weight of the air-dried soil. The soil samples were subjected to Atterberg limits and hydraulic conductivity tests for geotechnical observation and X-ray fluorescence tests for geochemical tests. The range of values for the geotechnical analyses were obtained as; plastic limit (9.1% – 14.2%), liquid limit (28.6 % – 61%), plasticity index ((18.2% – 49.5%) and hydraulic conductivity (1.85 – 4.1 x 10-8) cm/sec) with a resultant reduction in the plastic limit, liquid limit and plasticity index values but an increase in the hydraulic conductivity of the samples as the leachate concentration increased. The results from X-ray fluorescence analyses after 20% leachate contamination showed that the major elemental chemical composition for the three samples were comprised of SiO2 (56.25 – 56.5%), Al2O3 (28.42 – 28.50%), Fe2O3 (4.46 – 6.5%), TiO2 (1.08 – 1.23%), CaO (1.45 – 1.60%), P2O5 (0 – 0.04%), K2O (0.9 – 6.1%) and MnO (0.02 – 4.7%). There was a marginal alteration of the indices with the values inferring the presence of a minimum composition of feldspar and a major composition of quartz-rich minerals and thus lending more credence to the presence of silicates as shown from the X-ray fluorescence results. It also infers that the termite mounds are predominantly made from sand materials. The termite soil samples obtained from the aforementioned locations may not be suitable for engineering works unless stabilization procedure is adopted.
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渗滤液对白蚁丘土岩土力学和地球化学性质的影响
本研究研究了从尼日利亚西南部阿贝奥库塔的联邦农业大学提取的西方白蚁渗滤液对白蚁土壤土岩土力学和地球化学性质的影响。在三个不同地点采集白蚁丘土壤样本,每个样本分别以风干土壤干重的0%、10%、15%和20%的百分比添加渗滤液污染。对土壤样品进行了阿特伯格极限和水力导电性试验,用于岩土工程观察,对地球化学试验进行了x射线荧光试验。岩土分析的取值范围为:塑性极限(9.1% - 14.2%)、液体极限(28.6% - 61%)、塑性指数(18.2% - 49.5%)和水力导电性(1.85 - 4.1 × 10-8) cm/sec)随着渗滤液浓度的增加,塑性极限、液体极限和塑性指标值降低,但水力导电性增加。浸出液污染20%后的x射线荧光分析结果表明,3个样品的主要元素化学组成为SiO2(56.25 ~ 56.5%)、Al2O3(28.42 ~ 28.50%)、Fe2O3(4.46 ~ 6.5%)、TiO2(1.08 ~ 1.23%)、CaO(1.45 ~ 1.60%)、P2O5(0 ~ 0.04%)、K2O(0.9 ~ 6.1%)和MnO(0.02 ~ 4.7%)。这些指数有轻微的变化,其值推断出存在最小的长石成分和主要的富含石英的矿物成分,因此从x射线荧光结果中可以看出,更多的证据表明存在硅酸盐。这也可以推断白蚁丘主要是由沙子构成的。除非采取稳定措施,否则从上述地点获得的白蚁土样品可能不适合用于工程。
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来源期刊
Environmental & Engineering Geoscience
Environmental & Engineering Geoscience 地学-地球科学综合
CiteScore
2.10
自引率
0.00%
发文量
25
审稿时长
>12 weeks
期刊介绍: The Environmental & Engineering Geoscience Journal publishes peer-reviewed manuscripts that address issues relating to the interaction of people with hydrologic and geologic systems. Theoretical and applied contributions are appropriate, and the primary criteria for acceptance are scientific and technical merit.
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